Container closure



Patented pr. 15, 1930 EMANUEL MLLER, F UNTER-ENGSTRINGEN, NEAR ZURICH, SWITZERLAND CONTAINER CLOSURE Application iled February 28, 1929, Serial No. 343,288, and in Switzerland April 4, 1928.

wherein to enable easier cleaning the fittings,

more particularly the bow member, are attached to the cover. Hitherto however such closures always had the disadvantage that the parts at which the bow surfaces engage with the cam members attached to the milk can throat are very narrow and consequently wear away rapidly. Closely associated therewith is the disadvantage also that movement of the cover is limited and that the cover in consequence cannot be tightened up when in use so that the closure becomes loose as time goes by. All these disadvantages are eliminated by the present invention.

The releasable closure between two parts of a container, the container proper and its cover, comprises according to the invention conical trunnions upon one part and an elastic bow pivotally mounted on the other and provided with means for engaging the first part and with cam devices, shaped similarly to said trunnions, for engaging the latter, the elasticity of the bow allowing of movement of said cam devices axially of said trunnions and variation of the closure pressure.

In a specilic form the bow is provided with hook-shaped ends in the vicinity of which it is so mounted as to be rotatable to a limited extent about its axis; said bow is elastic in the axial direction. The hook-shaped ends engage with conical pins associated with the container, said pins and the surfaces on the hooks for bearing on the same being so designed that depending upon the bearing pressure on the surface of the container cover or of the cover bow hooks on the can, the latter can move along the pins for the purpose of modifying the closure pressure on the can by alteration of the distance between the centre of the pins and the surface whereat the cover bears on the container opening.

One embodiment of the invention is illustrated by way of example in the accompanying drawing in which:

F ig. l is a lateral elevation of a milk can closure,

Fig. 2 a longitudinal section through the closure and Fig. 3 is a plan thereof.

Referring to the drawings l is a milk can cover provided with a sealing-,ring 2. 3 are bearings for a shaft i carrying a hooked bow 5. The shaft i is fixed at one side but not at the other so that the bow can stretch or be extended in the direction of its longitudinal axis coincident withv 4. 6 are conical pins on the throat band ring of the milk can. rlhe conical shape of the pins 6 is the same as that of the bearing or cam surfaces 7 on the hooks 8 of the bow 5. The result of this is that in every position of the bow hooks relatively to the centre of the can the bearing surface between the pins and hooks remains comparatively large and wear is reduced.

In certain circumstances the bow might be also constructed with the lower hook bent outwardly as is indicated by a dotted line in Fig. 3.

What I claim is l. A releasable closure between two parts of a container, the container proper and its cover, comprising in combination conical trunnions upon one part and an elastic bow pivotally mounted on the other and provided with means for engaging the first part and with cam devices, shaped similarly to said trunnions, for engaging the latter, the elasticity of the bow allowing of movement of said cam devices axially of said trunnions and variation of the closure pressure.

2. A releasable closure between a milk can and its cover comprising conical trunnions associated with the can and an elastic bow pivoted relatively to the cover, with which it is operatively connected, and provided with hook-shaped cam ends shaped similarly to said trunnions for engaging the latter, the elasticity of the bow allowing of movement of said hook-shaped ends axially of said trunnions.

3. A. milk can closure means comprising a hooked bow mounted at its ends upon the cover, rotatable to a limited extent about its axis and elastic in its axial direction and conical pins, engaged by the bow hooks, upon the can body, the conical pins and correspending surfaces on the hooks bearing on said pins being ada ted, depending upon the bearing pressure o the can cover, or of the hooks, on the can to allow said hooks to move along the pins for the purpose of adjusting the closure pressure by alteration of the distance between the centre of the pin and the surface whereby the cover bears on the can opening.

DR. JUR. EMANUEL MLLER. 

